exsc 223 true / false final questions

42) Positive feedback mechanisms tend to increase the original stimulus

true

43) Imaging is useful in discovering obstructed blood supplies in organs and tissues

true

44) The anatomical position means the body is standing at attention with the palms facing forward and the thumbs pointing away from the body

true

45) The elbow is proximal to the shoulder

false

46) The serous membrane that lines the peritoneal cavity wall is called visceral peritoneum

false

47) A major function of serous membranes is to decrease friction

true

48) The right hypochondriac region contains the majority of the stomach

false

49) Lungs carry out an excretory function

true

50) Embryology concerns the structural changes that occur in an individual from conception through old age

false

51) A tissue consists of groups of similar cells that have a common function

true

52) It is important for any organism to maintain its boundaries, so that its internal environment remains distinct from the external environment surrounding it

true

53) Without some sort of negative feedback mechanism, it would be impossible to keep our body chemistry in balance

true

54) Regardless of the variable being regulated, all homeostatic control mechanisms have at least three interdependent components

true

55) The epigastric region is located superior to the umbilical region

true

Goblet cells require an extensive rough ER in order to perform their primary function

true

Magnetic Resonance imaging is a useful technique for imaging soft tissue but cannot be used in patients with metal implants

true

Anatomy is explained by chemical and physical principles and is concerned with the function of specific organs or organ systems

false

The higher the pH , the higher the hydrogen ion concentration

false

Achilles was wounded by damage to the tendon connecting his calf muscles to his heel. This and all tendons are composed mainly of dense regular connective tissue.

true

Benign neoplasms are cancers that can spread (Metastasize) to other regions of the body.

false

Buffers cause abrupt and large changes in the pH of the body by releasing or binding H+ ions.

false

37) The atomic weight is only an average of relative weights of an atom and its isotopes, and it may vary from the weight of a specific isotope

true

38) Emulsions and colloids are the same thing

true

39) Chemical properties are determined primarily by neutrons

false

40) A charged particle is generally called an ion

true

41) Isotopes differ from each other only in the number of electrons contained

false

42) About 60% to 80% of the volume of most living cells consists of organic compounds

false 43) Lipids are a poor source of stored energy = false

44) Current information theorizes that omega-3 fatty acids decrease the risk of heart disease

true

45) Glucose is an example of a monosaccharide

true

46) A molecule consisting of one carbon atom and two oxygen atoms is correctly written as CO2

true

47) The lower the pH, the higher the hydrogen ion concentration

true

48) Covalent bonds are generally less stable than ionic bonds

false

49) Hydrogen bonds are comparatively strong bonds

false

50) The fact that no chemical bonding occurs between the components of a mixture is the chief difference between mixtures and compounds

true

51) Alpha particles, although relatively weak energy particles, are second only to smoking as a cause of lung cancer

true

52) No chemical bonding occurs between the components of a mixture

true 53) All organic compounds contain carbon = true

54) A dipeptide can be broken into two amino acids by dehydration synthesis

false

55) The pH of body fluids must remain fairly constant for the body to maintain homeostasis

true

56) Mixtures are combinations of elements or compounds that are physically blended together but are not bound by chemical bonds

true

57) Buffers resist abrupt and large changes in the pH of the body by releasing or binding ions

true

36) Each daughter cell resulting from mitotic cell division has exactly as many chromosomes as the parent cell

true

37) Apoptosis is programmed cell suicide, but cancer cells fail to undergo apoptosis

true

38) DNA contains "dark matter" that codes for specific structural proteins

false

39) Final preparation for cell division is made during the cell life cycle subphase called G2

true

40) Chromatin consists of DNA and RNA

false

41) In osmosis, movement of water occurs toward the solution with the lower solute concentration

false

42) The genetic information is coded in DNA by the regular alternation of sugar and phosphate molecules

false

43) A process by which large particles may be taken into the cell for food, protection of the body, or for disposing of old or dead cells is called phagocytosis

true

44) The orderly sequence of the phases of mitosis is prophase, metaphase, anaphase, and telophase

true

45) Diffusion is always from areas of greater to areas of lesser concentration

true

46) Facilitated diffusion always requires a carrier protein

false

47) DNA transcription is another word for DNA replication

false

48) The glycocalyx is often referred to as the "cell coat," which is somewhat fuzzy and sticky with numerous cholesterol chains sticking out from the surface of the cell membrane

false

49) In their resting state, all body cells exhibit a resting membrane potential ranging from -50 to about +50 millivolts

false

50) Microfilaments are thin strands of the contractile protein myosin

false

51) Interstitial fluid represents one type of extracellular material

true

52) The cell (plasma) membrane normally contains substantial amounts of cholesterol

true

53) Aquaporins are believed to be present in red blood cells and kidney tubules, but very few other cells in the body

false

54) Most organelles are bounded by a membrane that is quite different in structure from the lipid bilayer of the plasma membrane

false

55) Only one cell type in the human body has a flagellum

true

56) Microtubules are hollow tubes made of subunits of the protein tubulin

true

57) Telomeres are the regions of chromosomes that code for the protein ubiquitin

false

58) Nitric oxide may act as a biological messenger

true

27) The shock-absorbing pads between the vertebrae are formed of fibrocartilage

true

28) Brown fat is frequently deposited between the shoulder blades of infants

true

29) Achilles was wounded by damage to the tendon connecting his calf muscles to his heel. This and all tendons are composed mainly of dense irregular connective tissue

false

30) Macrophages are found in areolar and lymphatic tissues

true

31) Goblet cells are found with pseudostratified ciliated columnar epithelium

true

32) Epithelial tissues always exhibit polarity; that is, they have a free surface and a basal surface

true

33) Simple cuboidal epithelia are usually associated with secretion and absorption

true

34) Depending on the functional state of the bladder, transitional epithelium may resemble stratified squamous or stratified cuboidal epithelium

true

35) Stratified cuboidal epithelium is moderately rare in the body and found only in the pharynx, larynx, and anorectal junction

false

36) Endothelium covers and lines internal cavities such as the pleural and peritoneal cavities

false

37) Merocrine glands produce their secretions by accumulating their secretions internally and then rupturing the cell

false

38) Salivary glands exhibit simple tubuloalveolar glandular arrangement

false

39) Connective tissues that possess a large quantity of collagen fibers often provide the framework for organs such as the spleen and lymph nodes

false

40) The basic difference between dense irregular and dense regular connective tissues is in the amount of elastic fibers and adipose cells present

false

41) A major characteristic of fibrocartilage is its unique amount of flexibility and elasticity

false

42) Cartilage tissue tends to heal less rapidly than bone tissue

true

43) Intercalated discs and striations are found in skeletal muscle

false

44) Smooth muscle cells possess central nuclei but lack striations

true

45) Most connective tissues have regenerative capacity, while most epithelial tissues do not

false

46) Squamous cells are flattened and scalelike when mature

true

47) Functions of connective tissues include binding, support, insulation, and protection

true

48) Sweat glands are apocrine glands

false

49) Endocrine glands are often called ducted glands

false

50) Blood is considered a type of connective tissue

true

51) Nervous tissue consists mainly of neurons and collagen fibers

false

22) The apocrine sweat glands are fairly unimportant in thermoregulation

true

23) Skin surface markings that reflect points of tight dermal attachment to underlying tissues are called epidermal ridges

false

24) The dense fibrous connective tissue portion of the skin is located in the reticular region of the dermis

true

25) The outermost sheath of a hair follicle is the connective tissue root sheath

true

26) The protein found in large amounts in the outermost layer of epidermal cells is collagen

false

27) Joe just burned himself on a hot pot. A blister forms and the burn is painful. Joe's burn would best be described as a third-degree burn

false

28) Destruction of the matrix of the hair bulb would result in its inability to produce oil

false

29) The hyponychium is commonly called the cuticle

false

30) The reason that the nail bed appears pink is the presence of a large number of melanocytes in the underlying dermis

false

31) During the resting phase of hair growth, the matrix is inactive and the follicle atrophies

true

32) The most dangerous skin cancer is melanocytes

true

33) The skin is not able to receive stimuli because the cells of the epidermis are not living and therefore there are no sensory receptors in the skin

false